using System.Linq;
using System.Windows;

using Autodesk.Revit.DB;

using Nice3point.Revit.Toolkit.External.Handlers;

namespace Szmedi.RvKits.InfoManager
{
    public partial class ReplaceParamValueViewModel : ObservableObject
    {
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(ReplaceCommand))]
        private string sourceStr;
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(ReplaceCommand))]
        private string targetStr;

        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(ReplaceCommand))]
        private string propertyName;

        readonly ActionEventHandler handler;

        [ObservableProperty]
        private bool isSelectedItems;
        private bool CanRepalce() => !string.IsNullOrEmpty(SourceStr) && !string.IsNullOrEmpty(TargetStr) && !string.IsNullOrEmpty(PropertyName);
        public ReplaceParamValueViewModel()
        {
            handler = new ActionEventHandler();
        }
        [RelayCommand(CanExecute = nameof(CanRepalce))]
        private void Replace()
        {
            handler.Raise(
                uiapp =>
                {
                    var uidoc = uiapp.ActiveUIDocument;
                    var doc = uidoc.Document;

                    doc.Invoke(
                            _ =>
                            {
                                ICollection<ElementId> collection;
                                if (IsSelectedItems)
                                {
                                    collection = uidoc.Selection.GetElementIds();
                                    if (collection.Count == 0)
                                    {
                                        MessageBox.Show("请先选中元素");
                                        return;
                                    }
                                }
                                else
                                {
                                    collection = doc.ActiveView.OfCollector().ToElementIds();
                                }
                                foreach (var id in collection)
                                {
                                    var elem = doc.GetElement(id);
                                    var param = elem.GetParameters(PropertyName).FirstOrDefault();

                                    if (param != null && !param.IsReadOnly)
                                    {
                                        var sourceValue = param.AsString();
                                        if (string.IsNullOrEmpty(sourceValue))
                                        {
                                            sourceValue = param.AsValueString();
                                            if (string.IsNullOrEmpty(sourceValue))
                                            {
                                                continue;
                                            }
                                            var targetStrValue = sourceValue.Replace(SourceStr, TargetStr);
                                            param.SetValueString(targetStrValue);
                                            continue;
                                        }
                                        var targetValue = sourceValue.Replace(SourceStr, TargetStr);
                                        param.Set(targetValue);
                                    }
                                }
                            },
                            "查找替换属性");
                    MessageBox.Show("替换完成");
                });
        }
    }
}